The following is the representation of a single word floating point number:
Data General Floating Point Representations: (Word 1 of 2)  
0 
1  2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12  13  14 
15 
16 

Sign Bit  Exponent  Highorder fraction 
Data General Floating Point Representations: (Word 2 of 2)  
17 
18  19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
30 
31 
32 

Loworder fraction 
The exponent is biased by 64. Negative floating point numbers are the one's complement of the positive number.
"Double precision" floating point numbers are as above,
with the addition of two extra words of precision::
Data General Floating Point Representations: (Word 1 of 4)  
0 
1  2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12  13  14 
15 
16 

Sign Bit  Exponent  Highorder fraction 
Data General Floating Point Representations: (Word 2 of 4)  
17 
18  19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
30 
31 
32 

Loworder fraction 
Data General Floating Point Representations: (Word 3 of 4)  
33 
34 
35 
36 
37 
38 
39 
40 
41 
42 
43 
44 
45 
46 
47 
48 

Lowerorder fraction 
Data General Floating Point Representations: (Word 4 of 4)  
49 
50 
51 
52 
53 
54 
55 
56 
57 
58 
59 
60 
61 
662 
63 
64 

Lowestorder fraction 
Integer numbers are stored in one 16bit word. They
are in twos complement.